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Re: [scl.org] Setting SCL RPM build options in COPR?

Hi Nick,

sending the mail again since I did not send the reply to list before (sorry!).

On 09/19/2017 08:16 AM, Nick Coghlan wrote:
On Mon, Sep 18, 2017 at 9:29 PM, Honza Horak <hhorak redhat com> wrote:
On 09/18/2017 07:29 AM, Nick Coghlan wrote:
2. Assuming I haven't missed anything, how do the *default* values for
"scl" and "vendorscl" actually get set?
We can kinda control what packages are part of the minimal buildroot for
every copr or cbs tag -- for SCL case there is the <scl>-build package that
sets this 'scl' macro. You can add more macros if you like and they will be
defined at a time a particular SRPM/RPM is built. By that trick and changing
what macros are defined in <scl>-build, you may basically build more
variants of a single SRPM and produce different output.
That's what I thought, but I couldn't find anything in sclorg-distgit
that actually *sets* them for the rh-python35 case.

has the comment "the @scl * macros are defined in
macros.python3.python33 in python33-python-devel"

That's presumably referring to
which still doesn't *set* "@scl@" or "@vendorscl@", it assumes they're
set somewhere else.

The "@scl@" and "@vendorscl@" symbols are replaced by proper values during the build of the metapackage [1], and the resulting macros get installed using the *-build sub-package [2] as Honza mentioned.

[1] https://github.com/sclorg-distgit/rh-python35/blob/sig-sclo7-rh-python35-rh/rh-python35.spec#L113 [2] https://github.com/sclorg-distgit/rh-python35/blob/sig-sclo7-rh-python35-rh/rh-python35.spec#L137

So I'm still confused as to:

- what's up with the "@" symbols in "@scl@" and "@vendorscl@"?
- where can I find an example package that shows how to define them
via a package in the buildroot so I can set up sclo-python-preview
COPR builds?
- where can I find documentation that explains how to do this when you
*can't* pass arbitrary RPM build options?


P.S. https://www.softwarecollections.org currently appears to be down
(I noticed when attempting to find docs about this)

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